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<table width="100%" summary="page for PatentsRD"><tr><td>PatentsRD</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Patents, R\&amp;D and Technological Spillovers for a Panel of Firms </h2>

<h3>Description</h3>

<p>a panel of 181 observations  from 1983  to 1991
</p>
<p><em>number of observations</em> :  1629
</p>
<p><em>observation</em> :  production units
</p>
<p><em>country</em> :  world
</p>


<h3>Usage</h3>

<pre>data(PatentsRD)</pre>


<h3>Format</h3>

<p>A dataframe containing :
</p>

<dl>
<dt>year</dt><dd><p>year</p>
</dd>
<dt>fi</dt><dd><p>firm's id</p>
</dd>
<dt>sector</dt><dd>
<p>firm's main industry sector, one of 
<code>aero</code> (aerospace), <code>chem</code> (chemistry),
<code>comput</code> (computer), <code>drugs</code>, 
<code>elec</code> (electricity), <code>food</code>, 
<code>fuel</code> (fuel and mining), <code>glass</code>, 
<code>instr</code> (instruments), <code>machin</code> 
(machinery), <code>metals</code>, <code>other</code>, 
<code>paper</code>, <code>soft</code> (software), 
<code>motor</code> (motor vehicles) </p>
</dd>
<dt>geo</dt><dd>
<p>geographic area, one of <code>eu</code> (European 
Union), <code>japan</code>, <code>usa</code>, <code>rotw</code> 
(rest of the world)
</p>
</dd>
<dt>patent</dt><dd><p>numbers of European patent applications</p>
</dd>
<dt>rdexp</dt><dd><p>log of R\&amp;D expenditures</p>
</dd>
<dt>spil</dt><dd><p>log of spillovers</p>
</dd>
</dl>



<h3>Source</h3>

<p>Cincer, Michele (1997) &ldquo;Patents, R \&amp; D and technological spillovers at the firm level : some evidence from econometric count models for panel data&rdquo;, <em>Journal of Applied Econometrics</em>, <b>12(3)</b>, May&ndash;June, 265&ndash;280.
</p>


<h3>References</h3>

<p>Journal of Applied Econometrics data archive : <a href="http://qed.econ.queensu.ca/jae/">http://qed.econ.queensu.ca/jae/</a>.
Verbeek, Marno (2004) <em>A Guide to Modern Econometrics</em>, John Wiley and Sons, chapter 7.
</p>


<h3>See Also</h3>

<p><code>PatentsHGH</code>, 
<code>Index.Source</code>, 
<code>Index.Economics</code>, 
<code>Index.Econometrics</code>, 
<code>Index.Observations</code>,
<code>Index.Time.Series</code>
</p>


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